Motor.



' Original application filed November 14,

y WTTSED @TATE PATENT TQM THOMAS P. BROOKE, 0F CHICAGO, ILLINOIS.

MOTOR.

To all whom t may concern.'

Be it known that I, THOMAS P. BROOKE, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in lviotors, of which thefollowing is a specification.

This application is a division of my original application, Serial No.731244, tiled in the United States Patent Office, November 14th, 1912,and more particularly the present invention relates to improvements inthe valve mechanism of that typeof engine which is so constructed thatthe cylinders revolve around a common center in one `direction and thecrankrotates in a direction opposite thereto, the piston valves being soconstructed and arranged as to prevent the centrifugal force thuscreated from imduly influencing them in their opening and closingmovements and the invention has for one of its objects to provideimproved .means by whichthe `operation of the said -valves` will becontrolled. f

To the attainment of these ends and the accomplishment .of othernewy anduseful objects as will appear,Y the invention consists in the featuresof novelty in substantially the construction, combination andarrangement'of the several parts hereinafter more fully described, andclaimed and shown in the accompanying drawings illustrating theinvention and which:

Figure 1 is a view partly in elevation and partly inlongitudinal sectionof the piston and the piston valve.

Fig. 2 is a view partly in elevation and i partly in section and partlybroken away `head is provided with an opening having a spider extendingthereacross, within which spideris arranged a bearing 51 for the stem 52of the valve 53, the latter being seated upon the outside of the pistonwhile the stem 52 extends into the piston. An ,elastic member 54 such asa coil spring `surrounds the `stem 52 and one end engagesa Patented Aug.28, 1917.

1912, Serial No. 731,244. `Divided and this application filed August io,191e. serial No. 114,106.

shoulder 55 on the valve stem, and the other portion of the spider, andtends normally to hold the valve to its seat.

`Projecting from the inside of the head of the piston are extensions 56between which Athe endof the piston rod l5 projects and the piston rodis provided with an eye for the reception of a pin 57 which passesthrough the eye and also through alined openings in the extensions 56,whereby the piston rod is connected with the `piston and if desired afastening pin 5S may be provided for locking the pin 58 againstdisplacement.

Pivotally mounted upon the pin 57 and at points intermediate their endsare spaced arms 59, and these arms are preferably located between thepiston rod and respective extensions 56 of the piston head. Theextremities of these arms project for some distance beyond the pin 57and a counterweight 60 is secured between adjacent extremities of thearms and on one side of the pin, while a yoke designated generally bythe reference numeral 61 in Fig. 8, is pivoted as at 62 between theother extremities of the arms 59. This yokeis provided with a laterallyextended portion 63 having a cam face 64 `and the laterally extendingportion projects above the shoulder 55 on the valve stem, and stands oneach side of the stem so that the cam portion 64 will engage the face ofthe shoulder next the valve. The sides of the yoke 61 project for somedistance below the pivots 62, and links 65 are pivotally connected byone extremity as at 66 to the ends of the extensions 67 and by theirother extremities to projecting portions 68 of the extensions 56. Sothat when the arms 59 are oscillated about thepin 57 as a pivot, theyoke 61 will have a substan tially straight movement with respect to thewall of the body of the piston, this being accomplished by the properarrangement of the pivots 62, 66. j

One of these links 65 is `preferably airanged on each side of the pistonrod 15 and carried by the piston rod are antifriction rollers 70, onearranged on each side thereof and adapted to engage the-respective links65. With this construction it will be manifest that when the piston rod15 is given its oscillating movement about the pin 57, the rollers 70will be moved into or out of engagement with the respective links 65kand will operate upon these links at the proper times to move them abouttheir points of pivotal connection with the extensions 56, and therebyraise or shift the yoke Gl to raise the cam face 64 with respect to theshoulder 55, and thereby release the valve so that it can be unseatedagainst the tension of the elastic member 5.4, by the suction created inthe explosion end of the cylinder, when the piston is moved away fromthe explosionl end, to draw a charge into such end of; the cylinder andalso by centrifugal force on the valve. The valve 5,3'is thus releasedeach time the piston makes an inward stroke or a stroke in a directionaway from the explosion end of the cylinder. But the valve will only beunseated to uncover the opening in the` piston head to admit a charge offuel to the explosion end of the cylinder for each explosion, for thefollowing reason.

Assuming that the motor in which this piston is used is of a four` cycletype, and assuming further that there has been an eX- plosion in thecylinder, the piston will be at the limit oll its inward movementaftersuch explosion. rIfhe first movement of the piston toward` theexplosion end after the explosion, will force the burnt gases out of theeX- haust. Upon the return of the piston, the valve 5.3,will bereleasedin the manner above described, so that the suction in thecylinderA will` unseat the valve and a charge of fuel will be drawn intothe explosion end of the cylinder. Upon the next outward movement of thepiston, the valve will be seated while. the charge is being compressedand uponl the next inward movement of the piston, although the valvewill be released,

it will not be unseated because it will be held to its seat by thepressure of the gases behind the valve.

The counter-balance 60 and the arms 59 operate in such a manner as toreturn the yoke when the anti-friction rollers have passed` out ofengagement with the links 65.

What is claimed as new-is: l

l. The combination of a piston, a valv therein, a piston rod., anelement carried with thepiston and operating to close the valve, yaweighted arm pivotallyconnected with the vfor movement therewith andwith respect thereto, a weighted arm pivotally connected to the elementand to the piston,,the recited part-s operating upon the valve to closethe latter, a connection between the said element and the piston, andmeans loperating upon the said connection for shifting the saidelement4'against the stress of the said arm for releasing the valve.

3. The combination of a piston, a piston rod connected therewith, avalve in the piston, an element connected with the piston for movementtherewith and. with respect thereto, a weighted arm pivotally connectedto the element and to the piston, the recited parts operating upon thevalve to close the latter, a y connectionbetween the said element `andthe piston, said: piston rod being provided with a lateral projection inthe -path of movement of which the said connection is` located andadaptedto be engaged: and moved bythe projectionto shift the saidelement to release the valve.

Ll. The combination of a piston, a piston rod,-a valve in the piston, ayoke, a link pivotally connected with the yoke and also with the piston,anelement pivotall-y connected intermediatev its. ends with the piston,one end of the element having pivotal connection with the yoke, theother end o-.the element being weighted, said yoke operating to closethe valve, and means for intermittently shifting theyoke to release thevalve.

5. `The combination cfa piston, a piston rod, a valve in the piston,ayoke, a link` pivotally connectedwith. the yoke andalso with thepiston,` an element -pivotally connectedintermediate its ends with thepiston, one end of the element having pivotal connection with the yoke,the other end of theA element being weighted, said yoke. operating toclose the valve, and means connected `with yoke to. release the valve.

6. The combination ofI a piston, a piston rod, a valve in the piston, ayoke, a link pivotally connected' with the yoke and also with thepiston, an element pivotallyconnected intermediate lits ends-withthepiston,

vone end fof the lelement having pivotal' con-A the piston rod forintermittently shifting-thel p one end of the element havingvpivotal-connection with the yoke, the otherfend of the element beingweighted, said yoke operating toA 'close the valve, and Ameans adaptedto engage and. shift the link to, moveithe yoke for; intermittentlyreleasing the valve.

8. The combination ofa piston, a piston rod, a valve in the piston, ayoke, a link pivotallyconnected with the yoke andal'so with the piston,an element lpivotall-yconnected intermediate its ends With the piston,one end of the element being pivotally connected With the yoke, the`other end being Weighted, and a link having pivotal connection with theyoke and with the piston, there `being a projection on the piston rodadapted to engage and shift the link to move the yoke and release thevalve.

9. The combination of a piston, a piston rod, a valve in the piston, ayoke, a link pivotally connected With the yoke and also with the piston,an element pivotally connected intermediate its ends with the piston,one end of the element being pivotally connected with the yoke, theother end being Weighted, and a link having pivotal connection With theyoke and with the piston, there being a projection on the piston rodadapted to engage and shift the link to move the yoke and release thevalve, the said yoke extending lengthwise of the piston.

l0. The combination of a piston, a piston rod, a valve in the piston, ayoke, a link pivotally connected With the yoke and also With the piston,an element pivotally connected intermediate its ends with the piston,one end of the element being pivotally connected with the yoke, theother end being Weighted, and a link having pivotal connection Withnection of the said element and the said link with the yoke being spacedfrom each other longitudinally of the piston and arranged substantiallyin alinement.

ll. The combination of a piston, a piston rod, a valve in the piston, ayoke, a link pivotally connected With the yoke and also With the piston,and an element pivotally connected intermediate its ends with thepiston, one end oi' the element being pivotally connected with the yoke,the other end being Weighted, there being a projection on the piston rodadapted to engage and shift the link to move the yoke and release theValve, the said link extending for some distance in the path of movementof the said projection.

In testimony whereof I have signed my name to this speccation, in thepresence of tvvo subscribing Witnesses, on this 8th clay of August, A.D. 1916.

'rHoMAs P. BRookE.

Witnesses:

IRMA M. BARING, J. IFI. JocHUM, Jr,

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

